netdev - Re: [PATCH net-next v4 11/12] microchip: lan865x: add driver support for Microchip's LAN865X MAC-PHY

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Message-ID: <Zi1cbScrKzFN3PNT@builder>
Date: Sat, 27 Apr 2024 22:13:33 +0200
From: Ramón Nordin Rodriguez <ramon.nordin.rodriguez@...roamp.se>
To: Conor Dooley <conor@...nel.org>
Cc: Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, horms@...nel.org, saeedm@...dia.com,
	anthony.l.nguyen@...el.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, andrew@...n.ch, corbet@....net,
	linux-doc@...r.kernel.org, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	devicetree@...r.kernel.org, horatiu.vultur@...rochip.com,
	ruanjinjie@...wei.com, steen.hegelund@...rochip.com,
	vladimir.oltean@....com, UNGLinuxDriver@...rochip.com,
	Thorsten.Kummermehr@...rochip.com, Pier.Beruto@...emi.com,
	Selvamani.Rajagopal@...emi.com, Nicolas.Ferre@...rochip.com,
	benjamin.bigler@...nformulastudent.ch
Subject: Re: [PATCH net-next v4 11/12] microchip: lan865x: add driver support
 for Microchip's LAN865X MAC-PHY

On Sat, Apr 27, 2024 at 08:57:43PM +0100, Conor Dooley wrote:
> >  static const struct of_device_id lan865x_dt_ids[] = {
> > -       { .compatible = "microchip,lan8651", "microchip,lan8650" },
> 
> Huh, that's very strange. I don't see a single instance in the tree of a
> of_device_id struct like this with two compatibles like this (at least
> with a search of `rg "\.compatible.*\", \"" drivers/`.
> 
> Given the fallbacks in the binding, only "microchip,lan8650" actually
> needs to be here.
> 
> > +       { .compatible = "microchip,lan865x", "microchip,lan8650" },
> >         { /* Sentinel */ }
> >  };
> >  MODULE_DEVICE_TABLE(of, lan865x_dt_ids);
> > 
> > Along with compatible = "microchip,lan865x" in the dts
> 
> Just to be clear, the compatible w/ an x is unacceptable due to the
> wildcard and the binding should stay as-is. Whatever probing bugs
> the code has need to be resolved instead :)
> 

All right, so when I change to

@@ -364,7 +364,7 @@ static void lan865x_remove(struct spi_device *spi)
 }

 static const struct of_device_id lan865x_dt_ids[] = {
-       { .compatible = "microchip,lan8651", "microchip,lan8650" },
+       { .compatible = "microchip,lan8650" },
        { /* Sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, lan865x_dt_ids);

I still get the output
[    0.124266] SPI driver lan865x has no spi_device_id for microchip,lan8650
But the driver does probe and I get a network interface.

If no one beats me to it I'll single step the probe tomorrow.
R